org.deegree.security.drm
Class SecurityAccessManager

java.lang.Object
  org.deegree.security.drm.SecurityAccessManager

public class SecurityAccessManager
extends Object

This singleton manages access to the data stored in an associated SecurityRegistry -instance.

In order to use methods that read from the registry, a SecurityAccess instance has to be acquired first:

Example Code:

 SecurityAccess access = SecurityAccessManager.getInstance();

 ReadToken accessToken = access.acquireReadToken();

 Role role = access.getRoleById( accessToken, 1 );
 

If write access is needed as well, one has to acquire the exclusive SecurityTransaction. This is only possible if the User has the "write"-privilege.

Example Code:

   SecurityAccess access = SecurityAccess.getInstance ();
   SecurityTransaction lock = access.acquireSecurityTransaction (user);
   access.registerUser (lock, "TESTUSER");
   ...
   access.commitTransaction (lock);
   // after committing changes are made persistent
 

Version:

$Revision: 18195 $, $Date:26.03.2007$

Author:

Markus Schneider , last edited by: $Author:wanhoff$

Method Summary

void	abortTransaction(SecurityTransaction lock) Aborts the current transaction and undoes all changes made to the Registry.
SecurityAccess	acquireAccess(User user) Tries to acquire a SecurityAccess -instance.
SecurityTransaction	acquireTransaction(User user) Tries to acquire the SecurityTransaction for the given User.
void	commitTransaction(SecurityTransaction transaction) Ends the current transaction and commits all changes to the Registry.
static SecurityAccessManager	getInstance() Returns the only instance of this class.
User	getUserByName(String name) This method is only to be used to get an initial User object.
static void	initialize(String registryClassName, Properties registryProperties, long timeout) Initializes the SecurityAccessManager -singleton with the given Registry -instance.
static boolean	isInitialized()
(package private) void	verify(SecurityTransaction transaction) Verifies that the submitted Transaction is valid.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

initialize

public static void initialize(String registryClassName,
                              Properties registryProperties,
                              long timeout)
                       throws GeneralSecurityException

Initializes the SecurityAccessManager -singleton with the given Registry -instance.

Parameters:

registryClassName -

registryProperties -

timeout -

Throws:

GeneralSecurityException

isInitialized

public static boolean isInitialized()

Returns:

true if there is an instance

getInstance

public static SecurityAccessManager getInstance()
                                         throws GeneralSecurityException

Returns the only instance of this class.

Returns:

the only instance of this class.

Throws:

GeneralSecurityException

getUserByName

public User getUserByName(String name)
                   throws GeneralSecurityException

This method is only to be used to get an initial User object. (Otherwise one would need a User to perform a User lookup.)

Parameters:

name -

Returns:

the user

Throws:

GeneralSecurityException

acquireAccess

public SecurityAccess acquireAccess(User user)
                             throws GeneralSecurityException,
                                    UnauthorizedException

Tries to acquire a SecurityAccess -instance.

Parameters:

user -

Returns:

the instance

Throws:

GeneralSecurityException

UnauthorizedException

acquireTransaction

public SecurityTransaction acquireTransaction(User user)
                                       throws GeneralSecurityException,
                                              UnauthorizedException

Tries to acquire the SecurityTransaction for the given User. Only possibly for User s that have the "modify"-privilege.

NOTE: The implementation checks if the currentTransaction timed out BEFORE it checks if the user is allowed to write to the registry at all. This is because some JDBC-drivers (at least the JDBC-ODBC- bridge together with Microsoft Access (tm)) have been observed to return strange results sometimes when there's a transaction still going on (so that the privileges of the user cannot be retrieved reliably from the registry).

Parameters:

user -

Returns:

the transaction

Throws:

GeneralSecurityException

UnauthorizedException

verify

void verify(SecurityTransaction transaction)
      throws ReadWriteLockInvalidException

Verifies that the submitted Transaction is valid. There are two ways for it to become invalid:

• it is too old (and timed out)
• it ended (has been aborted / committed)

Parameters:

transaction -

Throws:

ReadWriteLockInvalidException

GeneralSecurityException - if transaction is invalid

commitTransaction

public void commitTransaction(SecurityTransaction transaction)
                       throws GeneralSecurityException

Ends the current transaction and commits all changes to the Registry.

Parameters:

transaction -

Throws:

GeneralSecurityException

abortTransaction

public void abortTransaction(SecurityTransaction lock)
                      throws GeneralSecurityException

Aborts the current transaction and undoes all changes made to the Registry.

Parameters:

lock -

Throws:

GeneralSecurityException